Agricultural disk machine



April 28, 1936. J. CHAMBERS ETYAL 2,038,71

AGRICULTURAL DISK MACHINE Filed Feb. 23, 1935 Rv ATTORNEY.

Patented Apr. 28, 1936 PATENT OFFICE,

AGRICULTURAL DISK MACHINE James Chambers, Saskatoon, Saskatchewan, andBess Ego, Toronto, Ontario, Canada, assignors to Massey-Harris Company,Limited, Toronto,

Ontario, Canada Application February 23, 1935, Serial No. 7,876

8 Claims.

This invention relates to agricultural disk machines in which aplurality of disk members are mounted on a frame, and is particularlydirected to the capacity of the machine to ride over stones or otherobstructions found in the ground under cultivation.

V The chief object of the invention is to provide a. construction whichmakes it much easier for the machine to ride over stones or otherobstructions, engaged by one or more of the disk members, than forheretofore known machines. A specific object is to provide a structure.which will permit the machine to ride over a stone without substantialinfluence by the weight of 1;, the rear furrow wheel which is normally aconsiderable'distance to the rear of the axis of the disk members. Afurther object is to provide a draft hitch which offers little, if any,resistance to the normal tendency of the main frame to tilt forward whenthe disc members ride over an obstruction.

The invention contemplates a construction which is free to buckle at twopoints as the disk members ride over a stone, that is, at the junctionbetween the main frame and the frame and axle of the rear furrow wheeland at the junction line between the main frame and the draft hitch, aswill be more fully explained by reference to the accompanying drawing inwhich:

Figure 1 is a perspective view of a disk machine embodying the inventionand with parts broken away, which are not necessary to illustrate theinvention.

Figure 2 is an enlarged elevation View of the 35 novel means forconnecting the main frame and rear furrow wheel assembly.

Figure 3 is a partial plan view illustrating the draft hitch connectionwith the main frame. 7

In the drawing, i is a main frame cross memher, to the rear of whichdisk members 2 are mounted in assembled relation with end member 3 ofthe frame and side wheels 4 and 5, as is common construction. A rearwheel assembly includes a rear furrow wheel 6 which is mounted on anaxle l, the remote end of which engages a socket bearing 8. This bearinghas at its lower end a forward extension or lug 9 engaging a fork at therear of the end member 3 of the main frame and a rearward extension H]to which a bracket ll of a rear wheel positioning device II is pivotallyattached by means of a pin l2. The positioning device also includes acam member i I secured to bracket l l and which bears on the axle 1 ofthe rear wheel 6. A pin I3 pivots the lug 9 on the fork. At the upperend of the socket bearing 8 is a forward extension M which carries'abracket I 5 providing an elongated slot constituting a sliding bearingfor a pin l6 carried by a bracket I! mounted loosely adjacent one end ofa rod I 8, the other end of. which is pivoted in the bracket II. Aspring !9 is positioned on the rod I8 with a nut 2!! for pressureadjustment. The usual depth adjustment rod 2| is adjustably connected tothe bracket 15. A spring 22 connects the main frame with the socketbearing 8 by means of a bar 23.

The tension of the spring l9 on the rod I8 is so adjusted by means ofthe nut 20 that the pressure exerted by the cam member H of the rearwheel positioning device on the axle I through bracket II is such thatthe left end of the machine, as viewed in Figure 1, will not swing backwhen operating in soft land conditions but, at the same time, when themachine turns sharply to the left and a positive pressure is exerted bythe axle l on the cam member H, the member II will raise and allow theaxle and wheel 6 to swivel.

v The draft hitch is pivotally connected directly to the main framemember I, as illustrated. A main member 24 is pivotally connected to theframe at 25 and is angularly disposed to receive a member 26, alsopivotally connected to the frame at 21. The member 24 has pivotallyconnected at its end an extension member 28, to which the usual steeringarm 29 is attached. These members are adjustable as to length, as shown.

The normal position for the mechanism for permitting stone jumping isshown in Figure 2 and a bolt 30 may be inserted inthe bracket l5 acrossthe slot, as shown, to retain the mechanism in this position, when it isnot desired to make the stone jumping feature available for operation.Figure 1 shows the position of the stone jumping mechanism as one of thedisks rides over a stone or other obstruction.

It will be observed that the normal tendency, when the machine ridesover a stone or the like, is for the frame to tilt forwardly, and theweight of the rear wheel 6, which is on the axle some distance behindthe frame, exerts, in the usual construction, considerable leverageholding the disks in the ground and provides a heavy weight to be liftedwhen clearing a stone. The stresses thus exerted strain the machine andtend to break or disfigure the disks.

In the present construction, with the bolt 30 removed, the machine hasmuch greater flexibility, the socket bearingB and rear wheelaccoutrements being free to pivot, allowing the main frame to rise andtilt forward as required when a stone is engaged, while the pin I6slides in the elongated bearing in the bracket l5, free ing the mainframe, as it rises, from the weight of the rear wheel. The machinebuckles, as it were, about the pivot i3. The spring 22 cushions thejoint and helps it to hinge as the ma- Thus, it will be observed, thehinge and the fiexibledraft hitch connection cooperate to provideiin themachine facility for stone jumping. 1 i

We claim:

1. An agricultural disk machine comprising in combination, a main framemember, a plurality of disk members'behind said main frame member,

an end frame member; a socket bearing pivoted to said end frame member,a rear wheel, an axle therefor one end of which engages said socketbearing, a rear wheel positioning device engaging said axle andpivotedto said socket'bearing, 'a bracket on said socket bearing havingan elongated slot therein, and a rod pivoted to said positioningdevice'and having a bearing adjacent its upper end for sliding contactin said slot.

2. An agriculturaldiskmachine comprising in combination, a frame, aplurality of disk members connected thereto, a 'rear wheel assemblypivoted on a horizontal axis to one end of said frame including a rearwheel positioning device, a bracket tied to said'frame, an elongatedslot in said bracket and a spring pressure control member for saidpositioning device having adjacent its upper end a bearing for slidingcon tact in said elongated slot.

3. A disk machine as defined in claim 1, having draft hitch memberspivotally connected to the main frame and to one another.

4. A disk machine comprising in combination a frame, disks connected tosaid frame, an end frame member extending rearwardly, a rear wheelassembly pivoted to said end frame member, and a spring pressure controlmember for said rear wheel assembly the upper end of which is mountedfor forward and backward movement with respect to the main frame.

5. In a disk machine of, the character described, a main frame, a rearwheel assembly pivotally secured to the frame and including a rear wheelpositioning device and a control member for said device and mechanismhaving engagement with said member whereby the rear wheel assembly maybuckle with respect to the frame as the machine rides over a stone;

6. A disk machine as defined in claim 5, hav- 7 ing draft hitch memberspivotally connected to the main frame.

7. In a. disk machine of the character described, a frame member, a rearwheel assembly pivotally secured to said frame member and including arear wheel positioning device, and acontrol member for said device theupper end of which is mounted for forward and backward movement withrespect to the frame member.

. 8. An agricultural disk machine comprising in.

spring pressure control member for said device.

the upper end of which is mounted for forward main frame.

JAMES CHAMBERS. ROSS EGO.

"and backward movement with respect to the

